Controlling device fob elevator-cabs and the like



E. wv oe AND 0. A. nzmans.

CONTROLUNG DEVICE FOR LEVAIOR CARS AND THE UKE.

APPLICATION mso scrmz, 1914.

v '1,317,06'2, Patented Sept. 23, 1919. f

a. fforvw rl/"(neas es STATES PATENT OFFICE;

ME AND CHARLES L-REHTEBS, 01 NEW YORK, 11'. Y., ASSIGNOBS 'IO ELEVLTQE SUPPLY & REYAIB .CQMPANY A. CORPORATION 01! ILLINOIS.

CONTROLLING DEVICE EOBELEVATOR-CARS All D THE LIKE.

act-1,0 2.

Application fled September 12, nit. lerlal no setup.

.wTo all whom; l B eit new: we, Eliivunwrmn and Camera A'Qlilmens, citizensot the United States-,i'esidm'g at 'New York c ty, New" foFElevatoi-Car e and the like, of which the :followingis a clear, full, and exact description: P v

Our intention relates to a device-for 'conhave inventedcertainnew and useprovements in Controlling Devices the operation of a motor operating" atrav car,."and our'object is to prevent theioperator frolii running the car/at too t a during a part of thetravel'of u t eicar.

In elevator a terns. installed In large buildings some .0 the bank of elevators usually run 'fexpress? for a art'of the distance. .Iu a-thirty-rtoi'y building for ex'ample, some 'of the will make no stop to the fifteenth floor and then continue as local cars from there to'theitop of the buildmg. In order that the car shall'run at high speed, say at the rate of 900 feet a minute, to the first 2! stop, a motor of relatively large'power 1s usuallyprovided. But as the o rator'may have to stop at .each floor from t e first local stop, itis undesirable to have the complete .hig ower of the motor under the 80 centre of the operator after he leayes the first local stop, because the frequentstarting and stop ing-of the car would waste power and we d often start the car at too great a.

,speed to be easily controlled for the local as stops.

Io ingover a sheave 2 and attached to a coun-.

ten-weight 3. The motor 4 is in this case an electric motor which may be direct-connected to thesheave as is usual. -32 is the usual {controller in the car by which the elevator 66 may be operated and its speed'eontrolled in It is therefore desirable to provide a construction by which a; suitable speed-re ducing means shall be introduced automatiing and Specification o! Lettera-Patent. Patented Sept, 23,1919.

thelordinary manner. 5 is a speed-reducing means for the motor, which Ill the present case is an ohmic resistance.

Assuming that the car is traveling upward and has not yet reached the floor at which the car becomes a local, the circuit is then through the controller 32, motor 4, contact 22, switch 7, contact 25 and back to the source of supply. The switch 7, if thrown across to contact withblock'24, will'cut in the resistance 5 and consequently reduce the s d at which the motor may be run, and i the switch is so thrown at or about the first local stop, the operator cannot thereafter run the car at the ex ressl. speed but '70 only at a rcducedspeed; I f thq'switch is thrown back to the position "shown'when the car on its down trip again reaches the'first local stop, the resistance will b e'cut out and the operator may then run his car at the I5, express speed again for the rest of the downward travel.-=--. v

, Various mea ns ma be provided for automatically throwing t e,switch at' the points .desired. In Fig. -1 'we have diagrammatically show .a construction b which this may be done by a. simple addition to the signal system now widely inuseand shown for example in the Smalley and Reiners Patent #634,220. 8 and 9 are magnets forthrow ing the switch from one side to the other.

10 and 11 are stationary contact strips,and

14 and 15 are moving brushes traveling along the same and which make contact at suitable times with the fixed-contacts 12 and 13.. 18 9 is a circuit-shifting switch thrown by the car as it reverses its direction of travel. Assume now that the fifteenth floor is the point at which the car becomes a local and that v. the fixed contact 13 is so, positi mad that 96 brush 15 will strike it when the r reaches the fifteenth floor, the circuit will then be closed from the b'attery'iQ through switch 18, contacts 17 and 11, brush 15, contact 13 magnet9 and back tothe battery. This will energize magnet 9 and throw the switch 7 across to the contact 24 whichwill then'cut in the resistance 5. The 0 rates theneannot run his car except at t e reduced speed. When the car reaches the top of the shaft and reverses its direction of travel, the; switch 18 will be thrown across to contact 16.

The brushes 13 and 14 are then in the dotted line ]position we will assume.- Whenthe car 1 reac es the fifteenth floor or thereabout in its downward travel, brush 14 will contact with block 12 and energize magnet 8, throwing switch 7 back again to the position shown and cutting out the resistance 5. Such an arrangement automatically prevents the operator from running his car at a too great s eed during the local travel of his car.

e points at which the switch 7 will be thrown may be determined by suitably lacing the contacts 12 and 18. They nee not he ]placed so as to throw the swltch at ex act y "the car. One 0 the same points during the travel of them is shown slightly in advance of the other. At 6 we have shown a conventional representation of suitable adlusting means for the resistance 5 so that the ocal cartzseed can be out down to any e1- tent desi In Fig. 2 we have shown a slightly dife switch 7. In this figure the resistance 5 is cut in and out by a weighted switch 7 operated by a magnet 23. The switch arm 20 'is moved in the direction indicated by the arrowwhile the car ismoving upl and strikes segment 21 at'the point where t e resistance is desired to be cut in.

In Fi 3 we rovide a pivoted switch arm 7 provi ed wi a spring-pressed toggle 27, 28which can be thrown in any manner desired, for'example by amoving part (not shown) which will contact with e tail 31 I and throw'the switch at the points desired.

We are aware that our invention may be adapted to various installations and types of motors and malt; be widely varied without departing from t e scope of our invention and we erefore do not desire to be limited to the constructions illustrated.

What we claim is:--

1. In combination with an elevator car, the path of travel of which comprises an expres zone and a local zone, an operatin motor for said ear, and means under contro of an operator on said car for starti and stopping said can at selected points in the loca zone, and for varying the speed of the motor throughout the ath of travel of said car, of means for re ucing the maximum speed limit of the motor, and automatic means for maintainin said speed reducing means in operative re ation to said motor while the car is in the local zone and for maintaining said speed reducing means out of operative relation to said motor while said car is in the express zone.

2. In combination with an elevator car.

noizsly wit an operating motor for said-car, means'cimder control of an operator on said car 'for stopping and starting said car at selected to predetermined points in its path .of means for reducing the maximum. speed 0 said motor, and automatic means controlled by the car at one of said predetermined points for rendering said speed reducing It means effective whenever the ear is between. certain of said points, and for rende said speed reducing means inefiective when the car is betweenother points. I I

3. The combination with anelevator car, 10 the path oftravel of which comprises an express zone and a local zone, an ope motor for said car, a controller onsaid car conductors for connecting said motor controller in circuit, said conductors includ 'fli mg two members of difl'erent resistances, a switch associated with said members, an electromagnet arranged to operate said switch to close said circuit through one of said members, a second electromagnet ar so ranged to operate said switch to closesaidf, circuit through the other-of said .-inembers,] a source of current for energizing said electromagnets and means operating'synchw h said car forconnecting one of 86 said magnets to said source of current when the car passes from its express zonefto its local zone and for connecting the other 613C? tromagnet to said sourceof current when said car passes from its local zone to. its ex: 90 press zone. y

4. In combination with an elevator car, the path of travel of which comprises an eipress zone and a local zone, an operat' motor for said car and means under cont l 'fi of an operative on said car for starting and stopping said car at selected points in the local zone and for varyin the speed of the motor throughout the pat of travel of said car; of means rendered efl'ective scan incident to the pa-ssageof the car into the local zone for limitin the speed of the motor as controlled by t e operative while the car is in the local zone, said means bei N11 dered inefi'ective as an incident to'lih 'e car 10; again passing into the express zone. I

Signed at W. 40 St., New York, N. Y.. this 10th day of Sept. 1914.

Witnesses: P. W. Wonrn,

C. H. HERMAN. 

